Download

The best way to get Upstart is from your distribution, who should have a pre-packaged version of Upstart available including jobs which either provide compatibility with the existing init system or implement a native Upstart boot sequence.

If your distribution doesn't yet have Upstart packages, or you're a distribution maintainer and want to package it, you'll want to start from the source code instead. Beware that this requires a little care since you'll need to write, or at least modify, jobs to ensure your system boots.

Source

Latest Stable Release: 1.13.2

Release notes
upstart-1.13.2.tar.gz

Previous Stable Release: 1.13.1

Release notes
upstart-1.13.1.tar.gz

Previous releases are available from download directory.

Packages

Ubuntu: Packages of Upstart are available from all current releases.
Fedora: Packages of Fedora are available from Fedora 9 onwards.
Debian: Michael Biebl maintains packages of upstart in the unstable distribution.